HCID 70544672, compound → HCID 13192234, compound

Participants

Reaction Steps

8.2 g (0.025 mol) of trans-3-hydroxy-4-phenoxy-1-carbobenzyloxy-piperidine are dissolved in 140 ml of methanol and hydrogenated in the presence of 0.8 g of a 5% strength palladium-on-charcoal catalyst under normal pressure and at room temperature. After the absorption of hydrogen has ceased, the catalyst is filtered off by means of diatomaceous earth and the filtrate is evaporated under a water pump vacuum. The crude base crystallies from methanol/ether and gives trans-3-hydroxy-4-phenoxy-piperidine with a melting point of 134°-136°. The neutral fumarate prepared therefrom with fumaric acid crystallises from methanol/ether; melting point 180°-183°.

Provenance & Evidence